18696780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{241}}^1\times {\mathrm{431}}^1$

素因数の和:687

約数の個数: 72

約数和(自身を含む): 57081024

約数和(自身を除く): 38384244

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 241, 431, 482, 723, 862, 964, 1205, 1293, 1446, 1724, 2155, 2169, 2410, 2586, 2892, 3615, 3879, 4310, 4338, 4820, 5172, 6465, 7230, 7758, 8620, 8676, 10845, 12930, 14460, 15516, 19395, 21690, 25860, 38790, 43380, 77580, 103871, 207742, 311613, 415484, 519355, 623226, 934839, 1038710, 1246452, 1558065, 1869678, 2077420, 3116130, 3739356, 4674195, 6232260, 9348390, 18696780]

約数ペア:

[(1, 18696780), (2, 9348390), (3, 6232260), (4, 4674195), (5, 3739356), (6, 3116130), (9, 2077420), (10, 1869678), (12, 1558065), (15, 1246452), (18, 1038710), (20, 934839), (30, 623226), (36, 519355), (45, 415484), (60, 311613), (90, 207742), (180, 103871), (241, 77580), (431, 43380), (482, 38790), (723, 25860), (862, 21690), (964, 19395), (1205, 15516), (1293, 14460), (1446, 12930), (1724, 10845), (2155, 8676), (2169, 8620), (2410, 7758), (2586, 7230), (2892, 6465), (3615, 5172), (3879, 4820), (4310, 4338)]